According to General Relativity, what is gravity?

Suppose an electron in an atom jumps from energy level 2 to energy level 4. Where does the extra energy come from?

According to experiment, which interpretation correctly describes the fundamental nature of reality?

Suppose you are on a spaceship flying toward Earth at 0.9c, where c is the speed of light. In your frame of reference your ship is 10 meters long (front-to-back). How long is your ship, as measured from Earth’s surface?

A 29-year-old woman presents with intermittent visual disturbances, right arm weakness, and numbness in the left leg. MRI of the brain and spinal cord reveals multiple demyelinating lesions in both supratentorial and spinal regions. Which of the following best explains the asymmetric and varied presentation of her symptoms?

According to our class discussion, the author in Pirandello’s “Six Characters in Search of an Author” is somewhat like a                   

Where did Hedda Gabler acquire her pistols?                                          

The poem we read that refers to his belief in gyres and says the falcon can no longer hear the falconer is                

Neruda’s “I’m Explaining a Few Things” compares the color of the geraniums to    

Several times during the course of the play Pirandello makes less than complimentary remarks about